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question about 303 Mosquito canopy operation



 
 
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  #1  
Old July 25th 20, 05:35 PM posted to rec.aviation.soaring
[email protected]
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Default question about 303 Mosquito canopy operation

I’m building a 1-pc canopy for my HP-16 and I like the 303 Mosquito hinge method of unequal length arms. I’ve seen photos of the canopy but don’t understand what prevents the fwd hinge links from sliding fwd in the slot prematurely and striking the fuselage. Do the springs that assist in opening the canopy also pull aft and keep the fwd links at the aft end of the slot? Or, do the canopy stops that limit fwd travel wedge against something like a cam and push the links aft in the slot while the canopy is in motion?
Thanks, Brian
  #2  
Old July 25th 20, 09:14 PM posted to rec.aviation.soaring
Dan Marotta
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Default question about 303 Mosquito canopy operation

I owned a Mosquito back in the late 80s and I don't remember any springs
associated with the canopy.Â* As I recall, you simply lift the canopy up
and rotate it forward and it slides on tracks with mushroom shaped
buttons running inside the tracks.

Sorry I can't be more descriptive...

On 7/25/2020 10:35 AM, wrote:
I’m building a 1-pc canopy for my HP-16 and I like the 303 Mosquito hinge method of unequal length arms. I’ve seen photos of the canopy but don’t understand what prevents the fwd hinge links from sliding fwd in the slot prematurely and striking the fuselage. Do the springs that assist in opening the canopy also pull aft and keep the fwd links at the aft end of the slot? Or, do the canopy stops that limit fwd travel wedge against something like a cam and push the links aft in the slot while the canopy is in motion?
Thanks, Brian


--
Dan, 5J
  #3  
Old July 26th 20, 03:53 AM posted to rec.aviation.soaring
Brian[_1_]
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Default question about 303 Mosquito canopy operation

I looked into it for my HP16. As I recall the front arms is shorter and rotate almost 180 degrees (maybe 160, would require some modeling to determine the geometry). The back arms longer (maybe twice as long as the front arms) so that it goes just about vertical (rotates 90 degrees).
Hope that helps, never got around to doing it with my HP16.

Brian
  #4  
Old July 26th 20, 04:13 PM posted to rec.aviation.soaring
Scott Williams[_2_]
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Default question about 303 Mosquito canopy operation

On Saturday, July 25, 2020 at 11:35:03 AM UTC-5, wrote:
I’m building a 1-pc canopy for my HP-16 and I like the 303 Mosquito hinge method of unequal length arms. I’ve seen photos of the canopy but don’t understand what prevents the fwd hinge links from sliding fwd in the slot prematurely and striking the fuselage. Do the springs that assist in opening the canopy also pull aft and keep the fwd links at the aft end of the slot? Or, do the canopy stops that limit fwd travel wedge against something like a cam and push the links aft in the slot while the canopy is in motion?
Thanks, Brian


Hey Brian,
This last year I bought a 303 mosquito.
The canopy mechanism is 'clunky' but works well and would be vastly easier to fabricate vs a more common front hinged canopy (read asw, etc)
FWIW,
Scott, N99300
  #5  
Old July 26th 20, 04:26 PM posted to rec.aviation.soaring
[email protected]
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Default question about 303 Mosquito canopy operation

I lightened this image and it shows more detail of the right, front canopy link and the spring-loaded arms I referenced in my first post. I suspect those two coil springs assist in raising the canopy and spring tension may be the only force holding the canopy linkage at the aft end of the slot.
Brian T
https://photos.app.goo.gl/NksLdmdciW9xMS6aA
  #6  
Old July 26th 20, 11:35 PM posted to rec.aviation.soaring
Brian[_1_]
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Posts: 399
Default question about 303 Mosquito canopy operation

The slot is probably what I missed when I was modeling it. The local 303 had been gone for a number of years before thought about putting this system on the HP. So I could only do it from memory.
 




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